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Tiny leak after new tyre fitted
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Well, the Slime didn't work to seal the front tire on my Yamaha (which I gave to my son-in-law last Saturday). The tire pressure went from 37 psi after I Slimed the tire, to 26 psi this morning. Soapy water was used to coat both beads of the tire at the rim and no bubbles were noticed. I have no idea how that leak is happening and what to do now. So far, I have removed the tire (which only had 2000 miles on it and was holding air just fine until three months ago) and checked it for anything sticking into the tread, replaced the tire valve with a new one and cleaned the inside of the wheel rim before reinstalling the tire. Now it has been coated with Slime and ridden for 40 miles, before being parked for 5 days. I am completely out of ideas what could be causing a leak of this magnitude. Right now I can only come up with two things to do. Either replace the almost new Continental tire, or pump up the tire before every ride. Any other ideas or suggestions would be appreciated.
Current motorcycle collection: 2002 Yamaha FZ1; 2018 Zero S 16.6 kWh
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Well, the Slime didn't work to seal the front tire on my Yamaha (which I gave to my son-in-law last Saturday). The tire pressure went from 37 psi after I Slimed the tire, to 26 psi this morning. Soapy water was used to coat both beads of the tire at the rim and no bubbles were noticed. I have no idea how that leak is happening and what to do now. So far, I have removed the tire (which only had 2000 miles on it and was holding air just fine until three months ago) and checked it for anything sticking into the tread, replaced the tire valve with a new one and cleaned the inside of the wheel rim before reinstalling the tire. Now it has been coated with Slime and ridden for 40 miles, before being parked for 5 days. I am completely out of ideas what could be causing a leak of this magnitude. Right now I can only come up with two things to do. Either replace the almost new Continental tire, or pump up the tire before every ride. Any other ideas or suggestions would be appreciated.
larry l langford
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Zitat von paleolithictech im Beitrag #17 The Yamaha is a 2002 FZ1 1000cc sport bike. Definitely uses tubeless tires. My last thought is to try to find a tub large enough for the wheel to fit in, fill it with water, after reinflating the tire and then air bubbles just have to show up. The tire is now losing 1.5 psi a day! Two weeks ago it was losing 1 psi daily. I can't imagine what could be causing that to happen, after two years of not leaking just 1 psi every two weeks. Hopefully, it is just a defective tire or valve and not a hairline crack in the wheel. I will report back eventually when I have more news.
Current motorcycle collection: 2002 Yamaha FZ1; 2018 Zero S 16.6 kWh
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Zitat von BEARR im Beitrag #19 That was the first thing I tried and didn't see any bubbles, but I replaced the entire valve anyway, without any change. Then I put soapy water all along the rim at the tire bead and didn't see any bubbles, either. But that likely didn't work very well, so my final plan is to remove the wheel when I get a chance and put it in a tub of water, one area at a time. That has got to show where the leak is happening, with a leak of 1.5 psi a day. But since I gave the bike to my son-in-law last week, I will let him perform that task.
Current motorcycle collection: 2002 Yamaha FZ1; 2018 Zero S 16.6 kWh
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Thu Aug 06, 2026 12:54 pm (Last edited: Thu Aug 06, 2026 12:54 pm)
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Well in my case; from advice gleaned elsewhere I tried replacing the valve cores (notwithstanding having tried the soapy water trick and finding nothing); and then temporarily reinflating the tyres to 50 PSI before letting them down to the correct values, on the basis that if the bead isn't quite properly seated, that might fix it. KC100->CB100N->CB250RS--------->DL650AL2->R1200RS->R1250RS |
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